// Copyright (C) Kumo inc. and its affiliates.
// Author: Jeff.li lijippy@163.com
// All rights reserved.
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published
// by the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.
//


#include <pollux/vector/constrained_vector_generator.h>

#include <pollux/expression/vector_writers.h>
#include <pollux/vector/utils.h>

namespace kumo::pollux::fuzzer {
    using exec::GenericWriter;
    using exec::VectorWriter;

    // static
    VectorPtr ConstrainedVectorGenerator::generateConstant(
        const AbstractInputGeneratorPtr &customGenerator,
        vector_size_t size,
        memory::MemoryPool *pool) {
        POLLUX_CHECK_NOT_NULL(customGenerator);
        POLLUX_CHECK(customGenerator->type()->isPrimitiveType());

        const auto &type = customGenerator->type();
        const auto variant = customGenerator->generate();

        return BaseVector::create_constant(type, variant, size, pool);
    }

    // static
    VectorPtr ConstrainedVectorGenerator::generateFlat(
        const AbstractInputGeneratorPtr &customGenerator,
        vector_size_t size,
        memory::MemoryPool *pool) {
        POLLUX_CHECK_NOT_NULL(customGenerator);

        VectorPtr result;
        const auto &type = customGenerator->type();
        BaseVector::ensure_writable(SelectivityVector(size), type, pool, result);
        VectorWriter<Any> writer;
        writer.init(*result);

        for (auto i = 0; i < size; ++i) {
            writer.setOffset(i);
            const auto variant = customGenerator->generate();
            if (variant.isNull()) {
                writer.commitNull();
            } else {
                POLLUX_DYNAMIC_TYPE_DISPATCH(
                    writeOne, type->kind(), variant, writer.current());
                writer.commit(true);
            }
        }
        return result;
    }
} // namespace kumo::pollux::fuzzer
